I also use EasyBCD for my dual boots. From time to time, mostly after distribution upgrades (e.g., 13.10 -> 14.04), the link from the EasyBCD-configured bootloader to grub2 is broken by an update of grub2. Every time this has happened, the fix was simply to boot into Windows and use … Read More
> then I tried also
> `$ sudo grub-install --root-directory=/mnt/ /dev/sda1`
**Be careful man!** I remember telling you in a PM that you have to be careful about every step you take and not let there be things that you don't understand in the commands that you issue. What … Read More
If I were you, I would try the boot-repair disk. It always repaired my broken boots in one click. Unfortunately, sourceforge is currently down, and I'm not sure you can download the disk.
Edit: if you have a live ubuntu disk, you can run boot-repair as explained [here](http://www.howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot/). Read More
hm, sourceforge is [back](http://sourceforge.net/projects/boot-repair-cd/). Read More
> Then when I restarted, it was GRUB the default loader
So, that means that the boot repair utility installed Grub on the MBR. There is no easy way to go back now. You pretty much have to keep it like that until the end of time.
> easyBCD still … Read More